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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The substance showed 0 % respiration inhibition of activated sludge at the highest test item concentration of 1000 mg/L according to the OECD guideline 209. The EC50 is higher than 1000 mg/L.

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L
EC10 or NOEC for microorganisms:
1 000 mg/L

Additional information

"Should read: > 1000 mg/L"

In order to test the toxicity to microorganism of the substance, activated sludge from predominantly domestic sewage plant was exposed to three nominal concentrations of the substance (10, 100, 1000 mg/l) and to the solution with positive reference substance for a period of 3 hours. Dissolved oxygen was recorded and respiration rates were calculated. 0 % respiration inhibition was observed at the highest concentration of test substance. This toxicity study is classified as acceptable and satisfies the guideline requirements for the toxicity study to microorganisms according to the OECD guideline 209.